1389423 has 16 divisors (see below), whose sum is σ = 2140160. Its totient is φ = 785376.

The previous prime is 1389403. The next prime is 1389431. The reversal of 1389423 is 3249831.

It is not a de Polignac number, because 1389423 - 2¹² = 1385327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1986 + ... + 2592.

It is an arithmetic number, because the mean of its divisors is an integer number (133760).

2^1389423 is an apocalyptic number.

1389423 is a deficient number, since it is larger than the sum of its proper divisors (750737).

1389423 is a wasteful number, since it uses less digits than its factorization.

1389423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726.

The product of its digits is 5184, while the sum is 30.

The square root of 1389423 is about 1178.7378843492. The cubic root of 1389423 is about 111.5864585772.

The spelling of 1389423 in words is "one million, three hundred eighty-nine thousand, four hundred twenty-three".